Screw clamp



FIG. 1 is a perspective view taken from the top back side of a first embodiment of a screw clamp showing my new design;

FIG. 2 is a front elevational view of the screw clamp of FIG. 1;

FIG. 3 is an elevational view of the back of the screw clamp of FIG. 1;

FIG. 4 is a plan view of the bottom of the screw clamp of FIG. 1;

FIG. 5 is a plan view of the top of the screw clamp of FIG. 1;

FIG. 6 is an elevational view of the right side of the screw clamp of FIG. 1;

FIG. 7 is an elevational view of the left side of the screw clamp of FIG. 1;

FIG. 8 is a perspective view taken from the top back side of a second embodiment thereof;

FIG. 9 is an elevational view of the front of the screw clamp of FIG. 8;

FIG. 10 is an elevational view of the back of the screw clamp of FIG. 8;

FIG. 11 is a plan view of the bottom end of the screw clamp of FIG. 8;

FIG. 12 is a plan view of the top end of the screw clamp of FIG. 8;

FIG. 13 is an elevational view of the right side of the screw clamp of FIG. 8;

FIG. 14 is an elevational view of the left side of the screw clamp of FIG. 8;

FIG. 15 is a perspective view taken from the top back side of a third embodiment thereof;

FIG. 16 is an elevational view of the front of the screw clamp of FIG. 15;

FIG. 17 is an elevational view of the back of the screw clamp of FIG. 15;

FIG. 18 is a plan view of the bottom end of the screw clamp of FIG. 15;

FIG. 19 is a plan view of the top end of the screw clamp of FIG. 15;

FIG. 20 is an elevational view of the right side of the screw clamp of FIG. 15; and,

FIG. 21 is an elevational view of the left side of the screw clamp of FIG. 15. 

The ornamental design for a screw clamp, as shown and described. 